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Friday, 17 April 2026
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Biology Past Questions and Answers

Jamb 1992 Biology Questions

Question 46:
Woman do not suffer from colour blindness because
  • A The trait is sex-linked
  • B Only men are colour blind
  • C The genes are recessive and sex-linked
  • D The genes occur on both the X and Y chromosomes
View Answer & Explanation
Question 47:
The hereditary materials of the cell is
  • A The R N A
  • B Protein
  • C The D N A
  • D Carbohydrate
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Question 48:
An example of plant adaptation to a xerophytic environment is represented by the development of
  • A Fleshy tissue and reduced leaves
  • B Broad canopy and extensive surface root system
  • C Thick barks and broad leaves
  • D Rough leaves and shallow root system
View Answer & Explanation
Question 49:
Which of the following factors is LEAST likely to affect the animals living in a fresh water habitat?
  • A Turbidity
  • B Temperature
  • C PH
  • D Salinity
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Question 50:
The theory of natural selection was developed by
  • A Lamarck and Darwin
  • B Darwin and Wallace
  • C Wallace and Mendel
  • D Mendel and Larmack
View Answer & Explanation